Ecology Summary - Hypnea pannosa

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Ecology Summary - Hypnea pannosa

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Ecology of Hypnea pannosa

Main Ref.	Trono, G.C. Jr., 2001
Remarks	Inhabits well in rocky habitats exposed to moderate wave action, usually lodged between coral rocks in subtidal areas (Ref. 80758); found in the high subtidal or lower intertidal zones of relatively sheltered rockflats or mudflats and sandbanks, restricted to areas where persistent low water salinity was likely to be rare (Ref. 82232). Thomas Subbaramaiah (1994) reported that growth of H. pannosa in Mandapam, India was best at lower temperatures and higher salinities (Ref. 82232). In Corpus Cristi, Suva Harbour, Fiji, H. pannosa were found but not very abundant; in Nasese/Nasova (near Ratu Sukuna Road junction), Suva Harbour, Fiji, plants of H. pannosa were abundant, but fairly small. Hypnea was very stunted, being usually >50 mm in length and often covered with filamentous epiphytes. In Draunibota Island, Suva Harbour, Fiji, isolated small H. pannosa plants were found entangled with turtlegrasses, but were not abundant. The sandee lee side of Tokatoka ni Kubu Reef has scattered plants of G.maramae and H. pannosa. In Laucala Island, Suva Harbour, Fiji, attached to or entangled with the turtlegrasses were small (>100 mm) seaweed plants identified as Gracilaria maramae and Hypnea pannosa (Ref. 82232).

Main Ref.

Trono, G.C. Jr., 2001

Remarks

Inhabits well in rocky habitats exposed to moderate wave action, usually lodged between coral rocks in subtidal areas (Ref. 80758); found in the high subtidal or lower intertidal zones of relatively sheltered rockflats or mudflats and sandbanks, restricted to areas where persistent low water salinity was likely to be rare (Ref. 82232). Thomas Subbaramaiah (1994) reported that growth of H. pannosa in Mandapam, India was best at lower temperatures and higher salinities (Ref. 82232). In Corpus Cristi, Suva Harbour, Fiji, H. pannosa were found but not very abundant; in Nasese/Nasova (near Ratu Sukuna Road junction), Suva Harbour, Fiji, plants of H. pannosa were abundant, but fairly small. Hypnea was very stunted, being usually >50 mm in length and often covered with filamentous epiphytes. In Draunibota Island, Suva Harbour, Fiji, isolated small H. pannosa plants were found entangled with turtlegrasses, but were not abundant. The sandee lee side of Tokatoka ni Kubu Reef has scattered plants of G.maramae and H. pannosa. In Laucala Island, Suva Harbour, Fiji, attached to or entangled with the turtlegrasses were small (>100 mm) seaweed plants identified as Gracilaria maramae and Hypnea pannosa (Ref. 82232).

Aquatic zones / Water bodies

	Marine - Neritic	Marine - Oceanic	Brackishwater	Freshwater
Marine zones / Brackish and freshwater bodies	supra-littoral zone littoral zone sublittoral zone	epipelagic mesopelagic epipelagic abyssopelagic hadopelagic	estuaries/lagoons/brackish seas mangroves marshes/swamps	rivers/streams lakes/ponds caves exclusively in caves

Highighted items on the list are where Hypnea pannosa may be found.

Habitat

Substrate	Benthic: sessile; Soft Bottom: sand; mud; Hard Bottom: rocky;
Substrate Ref.	Trono, G.C. Jr., 2001
Special habitats	Beds: rock; Coral Reefs; Corals: hard corals;
Special habitats Ref.	Trono, G.C. Jr., 2001

Associations

Ref.	Pickering, T. and S. Mario, 1999
Associations	epiphytic;
Associated with	turtlegrasses; Caulerpa racemosa; mangrove roots;
Association remarks	In Laucala Island, Suva Harbour, Fiji, attached to or entangled with the turtlegrasses were small (>100mm) seaweed plants identified as G. maramae and H. pannosa (Ref. 82232); In Kaba Peninsula, the horizontal stolons of Caulerpa plants were a conspicuous feature of the seabed, and other seaweeds (mainly Hypnea pannosa) were often found attached or tangled with them (Ref. 82232). In Draubota Island, Fiji, G. maramae and H. pannosa were found entangled with turtlegrass (Ref. 82232). At Vatoa, Fiji, drift plants of G. maramae, Hypnea and Enteromorpha were entangled in mangrove roots, and it is presumed that these were washed from the adjacent Tokatoka ni Kubu Reef (Ref. 82232).
Parasitism

feeding

Feeding type
Feeding type Ref.
Feeding habit
Feeding habit Ref.

Trophic Level(s)

Estimation method	original sample		unfished population		Remark
Estimation method	Troph	s.e.	Troph	s.e.	Remark
From diet composition
From individual food items
Ref.

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